Is it possible to separate R portion, G portion, B portion of an RGB image?

a = imread('eye.jpg');
imshow(a);title('H&E image');
text(size(a,2),size(a,1)+15,...
'Image Courtesy of Alen Partin,Johns Hopkins University',...
'FontSize',7,'HorizontalAlignment','right');
cform = makecform('srgb2lab');
lab_i = applycform(a,cform);
ab = double(lab_i(:,:,2:3));
nrows = size(ab,1);
ncols = size(ab,2);
ab = reshape(ab,nrows*ncols,2);
nColors = 3;
[cluster_idx,cluster_center] = kmeans(ab,nColors,'distance','sqEuclidean',...
'Replicates',3);
 pixel_labels = reshape(cluster_idx,nrows,ncols);
imshow(pixel_labels,[]),title('image labeled by clusterindex');
segmented_images = cell(1,3);
rgb_label = repmat(pixel_labels,[1 1 3]);
for k = 1:nColors
color = a;
color(rgb_label~=k) = 0;
segmented_images{k} = color;
end
imshow(segmented_images{1}),title('objects in cluster 1');
imshow(segmented_images{2}),title('objects in cluster 2');

If anyone knew some other program like this please post here..:)

[jonas]

This is the third time I have seen you post this code in the last 24h. I suggest you read up on Imread and how images are described by pixels.